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package com.centit.support.office;
import com.centit.support.algorithm.ReflectionOpt;
import org.apache.poi.hssf.usermodel.*;
import org.apache.poi.ss.usermodel.CellType;
import org.apache.poi.ss.usermodel.HorizontalAlignment;
import org.apache.poi.ss.usermodel.VerticalAlignment;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.util.List;
import java.util.Map;
/**
* 生成基本EXCEL工具类
*
* @author [email protected]
* 2013-6-25
*/
@SuppressWarnings("unused")
public class ExportExcelUtil {
public static InputStream generateExcel(List objLists) {
ByteArrayOutputStream baos = new ByteArrayOutputStream();
HSSFSheet sheet = ExportExcelUtil.createDefaultSheet();
try {
generateObjText(sheet, objLists);
sheet.getWorkbook().write(baos);
} catch (InvocationTargetException e) {
throw new RuntimeException(e);
} catch (IllegalAccessException e) {
throw new RuntimeException(e);
} catch (IOException e) {
throw new RuntimeException(e);
}
return new ByteArrayInputStream(baos.toByteArray());
}
/**
* 生成Excel字节流
*
* @param objLists 对象集合
* @param header Excel页头
* @param property 需要显示的属性
* @return InputStream excel 文件流
*/
public static InputStream generateExcel(List objLists, String[] header, String[] property) {
ByteArrayOutputStream baos = new ByteArrayOutputStream();
HSSFSheet sheet = ExportExcelUtil.createDefaultSheet();
generateHeader(sheet, header);
try {
generateText(sheet, objLists, property);
sheet.getWorkbook().write(baos);
} catch (IOException e) {
throw new RuntimeException(e);
} catch (InvocationTargetException e) {
throw new RuntimeException(e);
} catch (NoSuchMethodException e) {
throw new RuntimeException(e);
} catch (IllegalAccessException e) {
throw new RuntimeException(e);
} catch (NoSuchFieldException e) {
throw new RuntimeException(e);
}
return new ByteArrayInputStream(baos.toByteArray());
}
/**
* 生成Excel字节流
*
* @param objLists 对象集合
* @param header Excel页头
* @param property 需要显示的属性
* @return InputStream excel 文件流
*/
public static InputStream generateExcel(List objLists, String[] header, int[] property) {
ByteArrayOutputStream baos = new ByteArrayOutputStream();
HSSFSheet sheet = ExportExcelUtil.createDefaultSheet();
generateHeader(sheet, header);
try {
generateText(sheet, objLists, property);
sheet.getWorkbook().write(baos);
} catch (IOException e) {
throw new RuntimeException(e);
} catch (InvocationTargetException e) {
throw new RuntimeException(e);
} catch (NoSuchMethodException e) {
throw new RuntimeException(e);
} catch (IllegalAccessException e) {
throw new RuntimeException(e);
} catch (NoSuchFieldException e) {
throw new RuntimeException(e);
}
return new ByteArrayInputStream(baos.toByteArray());
}
/**
* 生成Excel字节流
*
* @param objLists 对象数组集合
* @param header Excel页头
* @return InputStream excel 文件流
*/
public static InputStream generateExcel(List objLists, String[] header) {
ByteArrayOutputStream baos = new ByteArrayOutputStream();
HSSFSheet sheet = ExportExcelUtil.createDefaultSheet();
generateHeader(sheet, header);
generateText(sheet, objLists);
try {
sheet.getWorkbook().write(baos);
} catch (IOException e) {
throw new RuntimeException(e);
}
return new ByteArrayInputStream(baos.toByteArray());
}
private static HSSFSheet createDefaultSheet() {
HSSFWorkbook wb = new HSSFWorkbook();
HSSFSheet sheet = wb.createSheet();
return new ExportExcelUtil(wb, sheet).getSheet();
}
private static void generateHeader(HSSFSheet sheet, String[] header) {
HSSFRow headerRow = sheet.createRow(0);
for (int i = 0; i < header.length; i++) {
HSSFCell cell = headerRow.createCell(i);
setCellStyle(sheet.getWorkbook(), cell);
cell.setCellValue(header[i]);
}
}
@SuppressWarnings("unchecked")
private static void generateText(HSSFSheet sheet, List objLists, String[] property) throws NoSuchFieldException, NoSuchMethodException, InvocationTargetException, IllegalAccessException {
for (int i = 0; i < objLists.size(); i++) {
HSSFRow textRow = sheet.createRow(i + 1);
for (int j = 0; j < property.length; j++) {
HSSFCell cell = textRow.createCell(j);
setCellStyle(sheet.getWorkbook(), cell);
//List中是Map类型
if (objLists.get(i) instanceof Map) {
Object val = ((Map) objLists.get(i)).get(property[j]);
cell.setCellValue(null == val ? "" : val.toString());
continue;
}
//List中是普通Po类型
Method method = ReflectionOpt.getGetterMethod(objLists.get(i).getClass(), property[j]);
if(method == null)
method = ReflectionOpt.getBooleanGetterMethod(objLists.get(i).getClass(), property[j]);
Object val = method.invoke(objLists.get(i));
cell.setCellValue(null == val ? "" : val.toString());
}
}
}
private static void generateText(HSSFSheet sheet, List objLists, int[] property) throws NoSuchFieldException, NoSuchMethodException, InvocationTargetException, IllegalAccessException {
for (int i = 0; i < objLists.size(); i++) {
HSSFRow textRow = sheet.createRow(i + 1);
for (int j = 0; j < property.length; j++) {
HSSFCell cell = textRow.createCell(j);
setCellStyle(sheet.getWorkbook(), cell);
//if (ClassUtils.isAssignableValue(Object.class, objLists.get(i).getClass())) {
Object val = (objLists.get(i))[property[j]];
cell.setCellValue(null == val ? "" : val.toString());
//}
}
}
}
private static void generateObjText(HSSFSheet sheet, List objLists) throws InvocationTargetException, IllegalAccessException {
for (int i = 0; i < objLists.size(); i++) {
HSSFRow textRow = sheet.createRow(i);
List getMethods = ReflectionOpt.getAllGetterMethod(objLists.get(i).getClass());
//Field[] fields = objLists.get(i).getClass().getDeclaredFields();
int errorLen = 0;
for (int j = 0; j < getMethods.size(); j++) {
HSSFCell cell = textRow.createCell(j - errorLen);
setCellStyle(sheet.getWorkbook(), cell);
Object val = getMethods.get(j).invoke(objLists.get(i));
cell.setCellValue(null == val ? "" : val.toString());
}
}
}
private static void generateText(HSSFSheet sheet, List objLists) {
for (int i = 0; i < objLists.size(); i++) {
HSSFRow textRow = sheet.createRow(i + 1);
for (int j = 0; j < objLists.get(i).length; j++) {
HSSFCell cell = textRow.createCell(j);
setCellStyle(sheet.getWorkbook(), cell);
cell.setCellValue(null == objLists.get(i)[j] ? "" : objLists.get(i)[j].toString());
}
}
}
private static void setCellStyle(HSSFWorkbook wb, HSSFCell cell) {
cell.setCellType( CellType.forInt(HSSFCell.ENCODING_UTF_16) );
cell.setCellStyle(getDefaultCellStyle(wb));
}
/**
* 设置单元格默认样式
*
* @param wb
* @return
*/
private static HSSFCellStyle getDefaultCellStyle(HSSFWorkbook wb) {
HSSFCellStyle cellStyle = wb.createCellStyle();
// 指定单元格居中对齐
cellStyle.setAlignment(HorizontalAlignment.CENTER);
// 指定单元格垂直居中对齐
cellStyle.setVerticalAlignment(VerticalAlignment.CENTER);
// cellStyle.setWrapText(true);// 指定单元格自动换行
// 设置单元格字体
HSSFFont font = wb.createFont();
// font.setBoldweight(HSSFFont.BOLDWEIGHT_BOLD);
font.setFontName("宋体");
// font.setFontHeight((short) 300);
cellStyle.setFont(font);
return cellStyle;
}
private HSSFWorkbook wb = null;
private HSSFSheet sheet = null;
private ExportExcelUtil() {
}
/**
* @param wb
* @param sheet
*/
private ExportExcelUtil(HSSFWorkbook wb, HSSFSheet sheet) {
super();
this.wb = wb;
this.sheet = sheet;
}
/**
* @return the sheet
*/
public HSSFSheet getSheet() {
return sheet;
}
/**
* @param sheet the sheet to set
*/
public void setSheet(HSSFSheet sheet) {
this.sheet = sheet;
}
/**
* @return the wb
*/
public HSSFWorkbook getWb() {
return wb;
}
/**
* @param wb the wb to set
*/
public void setWb(HSSFWorkbook wb) {
this.wb = wb;
}
}
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